Question

我使用约束布局在垂直链中有六个按钮。在我的模拟器中，看起来不错。您可以忽略两侧的两个按钮。我添加了他们的观点。

当我将应用程序放置在实际的相应设备上时，我会得到截然不同的视图。工具栏与我的顶部按钮重叠，导航栏与我的底部按钮重叠。

我已经读到仿真器并不总是正确的。鉴于此，我该如何考虑约束布局中工具栏和导航栏的高度。下面是我的xml。这六个按钮在下面的xml中分别命名为x21到x26。我为它的长度表示歉意。有没有一种方法可以解决此问题，或者需要在我的代码中计算工具栏和导航栏的高度并更新顶部和底部按钮的边距？如果我需要在代码中执行此操作，该怎么做。也许还有另一种方法，我将不胜感激。谢谢

<com.example.android.cop1803.LayoutCustom xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mylayoutcustom"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
tools:context="com.example.android.cop1803.MainActivity"
android:fitsSystemWindows="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:layout_editor_absoluteY="73dp">


<com.example.android.cop1803.MyViewbutton
    android:id="@+id/MainCOPbtn"
    android:layout_width="@dimen/layoutwidthMaincopbutton"
    android:layout_height="@dimen/layoutheightMaincopbutton"
    android:layout_marginStart="0dp"
    android:layout_marginTop="@dimen/activity_vertical_margin"
    android:background="@drawable/copbuttonmaineffect"
    android:text="@string/x11MainCOPtext"
    android:textAppearance="@style/MainButtonFontStyle"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.14"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"

    />
 <com.example.android.cop1803.MyViewbutton
    android:id="@+id/x21"
    android:layout_width="@dimen/layoutwidthcopbutton"
    android:layout_height="@dimen/layoutheightcopbutton"
    android:layout_marginTop="@dimen/activity_vertical_margin"
    android:background="@drawable/copbutton"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:text="@string/x21BreadingCrustCoatingsWraps"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toTopOf="@+id/x22"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_chainStyle="spread" />


<com.example.android.cop1803.MyViewbutton
    android:id="@+id/x22"
    android:layout_width="@dimen/layoutwidthcopbutton"
    android:layout_height="@dimen/layoutheightcopbutton"
    android:background="@drawable/copbutton"
    android:paddingLeft="1dp"
    android:paddingRight="1dp"
    android:text="@string/x22CuttingandManipulation"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toTopOf="@+id/x23"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/x21" />

<com.example.android.cop1803.MyViewbutton
    android:id="@+id/x23"
    android:layout_width="@dimen/layoutwidthcopbutton"
    android:layout_height="@dimen/layoutheightcopbutton"
    android:background="@drawable/copbutton"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:text="@string/x23DryRubsandStuffings"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toTopOf="@id/x24"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/x22" />

<com.example.android.cop1803.MyViewbutton
    android:id="@+id/x24"
    android:layout_width="@dimen/layoutwidthcopbutton"
    android:layout_height="@dimen/layoutheightcopbutton"
    android:background="@drawable/copbutton"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:text="@string/x24HerbandSpicePastes"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toTopOf="@id/x25"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/x23" />

<com.example.android.cop1803.MyViewbutton
    android:id="@+id/x25"
    android:layout_width="@dimen/layoutwidthcopbutton"
    android:layout_height="@dimen/layoutheightcopbutton"
    android:background="@drawable/copbutton"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:text="@string/x25MarinadesandBrines"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toTopOf="@id/x26"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/x24" />

<com.example.android.cop1803.MyViewbutton
    android:id="@+id/x26"
    android:layout_width="@dimen/layoutwidthcopbutton"
    android:layout_height="@dimen/layoutheightcopbutton"
    android:background="@drawable/copbutton"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:text="@string/x26SpicesandSpiceCrusts"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toTopOf="@id/x27"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/x25" />

<com.example.android.cop1803.MyViewbutton
    android:id="@+id/x27"
    android:layout_width="@dimen/layoutwidthcopbutton"
    android:layout_height="@dimen/layoutheightcopbutton"
    android:background="@drawable/copbutton"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:text="@string/x27Balance"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/x26" />

<com.example.android.cop1803.MyViewbutton
    android:id="@+id/x31"
    android:layout_width="@dimen/layoutwidthMedcopbutton"
    android:layout_height="@dimen/layoutheightMedcopbutton"
    android:layout_marginTop="@dimen/activity_vertical_margin"
    android:background="@drawable/copbuttonsecond"
    android:paddingLeft="1dp"
    android:paddingRight="1dp"
    android:text="@string/x31CookingTechniques"
    android:textAppearance="@style/ButtonFontStyle"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.64"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />



<android.support.design.widget.CoordinatorLayout
    android:id="@+id/coordinator_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clipToPadding="false"
    android:fitsSystemWindows="true"

    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.example.android.cop1803.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme"
        >
        <include
            android:id="@+id/toolbar"
            layout="@layout/toolbar_main"
            />
    </android.support.design.widget.AppBarLayout>
    <include
        android:id="@+id/cartlist"
        layout="@layout/content_main" />
</android.support.design.widget.CoordinatorLayout>

Answer 1

我认为你的意思是行动吧。尝试将操作栏边距添加到XML的根元素。

 android:paddingTop="?android:attr/actionBarSize"

Answer 2

您需要将app:layout_constraintTop_toTopOf="parent"更改为

app:layout_constraintTop_toBottomOf="@id/coordinator_layout"。

当您提供约束作为父对象时，它将采用您的父布局容器，其中也包括工具栏。相反，您希望将其限制在工具栏下方。

Answer 3

在首先设置ConstraintLayout的顶部添加T下方的最后一行：

<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"    
    app:layout_behavior="@string/appbar_scrolling_view_behavior"

约束布局中的appbar / toolbar重叠视图

3 个答案: